1 General thoughts
being reachable everywhere is no problem since sms came up, but do you know the mobilephone number of everybody? being able to send a message to a psyc unl instead would be incredibly great. basicly psyc could replace MMS and SMS without problems... but there are some stumbling blocks
2 WAP
At the moment, you can use net/wap/login to check your away-messages and send messages using net/wap/msg.
2.1 WAP-Push
To tell the user that he's got a new message, wap push would be great. but since you need to send a SI or SL over sms, it's not free... are there any other options?
sms prices start at 4c per sms to 8c.... what about a psyc-auth based paying service? ;)
3 J2ME
A j2me client could be a slim psyc client, only able to parse _message_public and _message_private + login/logout stuff. using gprs over java shouldn't be a problem, many email apps do it...
does anybody know if its possible to fork a j2me app into background?
4 Winblows Mobile / .NET Compact Framework
<Monkey> I'm no fan of Microsoft, however, my cellular phone has TCP/IP and runs .NET applications. It would not be terribly difficult to implement a simplistic PSYC client in C# that would run on this type of mobile device. It would seem that this has some advantages over SMS, however, mobile internet services are not very inexpensive. My service is 9ドル (USD) per month for 2 megabytes and 0ドル.05 per kilobyte overage. Mobile PSYC will surely become even more appealing as the cost for mobile internet comes down.